With the exception of exclusively test/stress modules, add all

of the modules we are compiling (in any shape).

drop mod_imagemap, mod_userdir from the default-loaded modules
add mod_authn_core/mod_authz_core to the default-loaded modules

Several other modules should be considered for default-loaded 
or default-not loaded changees.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@580249 13f79535-47bb-0310-9956-ffa450edef68